JP2010203490A - Laminated structure of spring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated structure of a spring which prevents the occurrence of abrasion by sliding between springs and between springs and counterpart members and the occurrence of hysteresis in load characteristics and which does not require a guide for matching the axes of the springs. <P>SOLUTION: Corner portions which can be deformed elastically are formed at the boundary portions of laminated portions 11, 12 and a body. Because the laminated portions 11, 12 have non-deformed portions at the side of members 101, 102 when a load is applied, sliding with the members 101, 102 can be prevented. In the laminated portion 11, inner diameter of the end at the corner portion side is set larger than the outer diameter of the end of the opposite side to the corner portion. In the laminated portion 12, outer diameter of the end at the corner portion side is set smaller than the inner diameter of the end of the opposite side to the corner portion. Laminated portions can be fitted to each other. In portions where the laminated portions contact each other, the contact portions are fixed because a large contact force is generated by being deformed toward each other when a load is applied. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a laminated structure of springs in which a plurality of springs each including a body portion having a hole portion are laminated between a first member and a second member so that the formation surfaces of the hole portions face each other. In particular, it relates to a technique for laminating springs.

  In various fields such as the automobile industry, precision equipment industry, home appliances, and architecture, a technology for suppressing vibration transmission is required. Vibration transmission suppression technology is applied to engines, motors rotating at high speeds, washing machine dewatering tanks, buildings, and the like. As a technique for suppressing vibration transmission, it is effective to set the natural frequency of a system composed of an object and a support sufficiently lower than a predetermined frequency band. As a method for this, it is conceivable to reduce the spring constant of the support portion. In this case, when the spring constant is reduced, the spring must be enlarged in order to support a high load.

  Therefore, a method using a disc spring between the object and the support portion has been proposed (for example, Patent Document 1). As shown in FIG. 11, the load characteristic of the disc spring has a region A having a low spring constant, so that a high load can be supported and the spring constant can be set small. And by using such a disk spring in piles, while being able to obtain a high load, space saving can be achieved.

Japanese Patent Laid-Open No. 10-311369

  However, when the disc spring is deformed so as to have a substantially flat shape when a load is applied, the inner peripheral edge and the outer peripheral edge of the disc spring slide against the mating member to generate friction. For this reason, as shown in FIG. 10, when the disc springs 201 are stacked, wear occurs by sliding between the disc springs 201 and between the disc spring 201 and the mating members 101 and 102. As a result, when the use range of the disc spring is set to the range of the region A in FIG. 11, hysteresis occurs in the actual load curve as shown in FIG.

  Further, in the disc spring 201, since the outer peripheral portion moves as described above when a load is applied, the disc springs 201 are not fixed to each other. For this reason, since the disc springs 201 slide sideways and an offset load is generated, a guide 202 for aligning the disc springs 201 is necessary.

  Therefore, the present invention can prevent the occurrence of wear due to sliding between springs and between a spring and a mating member, and the occurrence of hysteresis in load characteristics. It is an object of the present invention to provide a laminated structure of springs that eliminates the need for guides.

  The laminated structure of the spring of the present invention is a laminated structure in which a plurality of springs including a main body having a hole are laminated between the first member and the second member so that the formation surfaces of the holes are opposed to each other. In addition, it is formed on the inner peripheral portion and the outer peripheral portion of the main body portion, and includes a laminated portion protruding toward the adjacent spring, and a corner portion is formed at a boundary portion between the main body portion and the laminated portion. Is elastically deformable so that the angle changes according to the pressing force from the first member and the second member, and in the laminated portion on the inner peripheral side, the inner diameter of the end portion on the corner portion side is the corner portion side. Is set larger than the outer diameter of the end on the opposite side, and in the laminated part on the outer peripheral side, the outer diameter of the end on the corner is set smaller than the inner diameter of the end opposite to the corner. It is characterized by having.

  In the laminated structure of the spring of the present invention, in the spring adjacent to the mating member (the first member and the second member), the end of the laminated portion (the end opposite to the corner) abuts the mating member. In this case, since the corner portion of the spring can be elastically deformed when a load is applied, by appropriately setting the distance between the corner portion and the mating member in the laminated portion, the vicinity of the mating member in the laminated portion can be obtained when applying the load. The deformation of the part can be prevented. Therefore, since the sliding of the laminated portion with respect to the mating member can be prevented, wear does not occur between the laminated portion and the mating member. As a result, it is possible to prevent the occurrence of hysteresis in the load characteristics.

  In the adjacent springs, the inner diameter of the laminated portion on the inner peripheral side is set such that the inner diameter of the end on the corner side is larger than the outer diameter of the end opposite to the corner side, In the laminated portion, the outer diameter of the end portion on the corner portion side is set smaller than the inner diameter of the end portion on the opposite side to the corner portion. Thereby, in the lamination | stacking of a some spring, the lamination | stacking parts by the side of the inner peripheral part of the spring which adjoins mutually can be fitted, and the lamination | stacking parts by the side of the outer peripheral part of the spring which adjoins mutually can be fitted. Can do. Therefore, it is possible to prevent the occurrence of side slip (displacement in a direction perpendicular to the axial direction) between the springs. As a result, a guide for aligning the springs becomes unnecessary.

  Since the contact portions of the stacked portions of the springs deform toward each other when a load is applied, a large contact force is generated there, so the contact portions are fixed. Therefore, since the relative displacement of the contact portion between the stacked portions can be prevented, the occurrence of wear between the stacked portions can be prevented, and as a result, the occurrence of hysteresis in the load characteristics can be further prevented. Can do. Further, since the deflection of each spring becomes equal, it is possible to reliably obtain the generated load corresponding to the number of installed springs (that is, when the number of springs is N, the generated load of the laminated structure is N Can be doubled).

  Various configurations can be used for the laminated structure of the spring of the present invention. For example, the portion where the stacked portions abut can be fixed. In this aspect, since the relative displacement between the laminated portions that are in contact with each other can be reliably prevented when a load is applied, the same effect as in the case of fixing by the contact force can be obtained.

  Various shapes can be used for the spring to which the laminated structure of the spring of the present invention is applied. For example, the cross section of the laminated portion can be linear so as to connect the end portions. In this case, the effect of the contact force can be obtained with certainty by setting the length of the portion where the stacked portions abut each other to 15% or more of the length of the stacked portions. Further, the cross section of the main body can be S-shaped or stepped.

  According to the laminated structure of the spring of the present invention, it is possible to prevent the occurrence of hysteresis in the load characteristics and eliminate the need for a guide for axial alignment of the springs, as well as the generated load for the number of springs. Can be definitely obtained.

It is a sectional side view showing the state where the lamination structure of the spring concerning the embodiment of the present invention is installed between the 1st member and the 2nd member. 1 shows the configuration of the spring shown in FIG. 1, (A) is a perspective view, and (B) is a side sectional view of the right side portion of the spring. (A), (B) is a sectional side view showing the relationship of the length of the edge part of the inner peripheral part side laminated part and the outer peripheral part side laminated part of the spring of FIG. 1 represents the operating state of the right side portion of the spring shown in FIG. 1, (A) is a side cross-sectional view of the spring before operation (dotted line) and during operation (solid line), and (B) is the first state during operation of the spring. It is an expanded side sectional view of a 1 corner and a 2nd corner. It is a conceptual diagram showing the deformation | transformation state of the 1st laminated parts of the spring at the time of load application. It is a graph showing the simulation result regarding the laminated structure of the three springs of this invention example, and the load characteristic of a spring single-piece | unit. FIG. 3 is a side cross-sectional view of a right portion of a spring modification example shown in FIG. 2. FIG. 3 is a side cross-sectional view of a right portion of a spring modification example shown in FIG. 2. FIG. 3 is a side cross-sectional view of a right portion of a spring modification example shown in FIG. 2. It is a sectional side view showing the state where a disk spring was piled up and installed between the 1st member and the 2nd member. It is a graph showing the load characteristic of a disc spring. It is a graph showing the load characteristic of the actual disc spring which a hysteresis produces.

(1) First Embodiment (1-1) Configuration of Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a state in which a laminated structure of a plurality of (for example, three) springs 1 according to the first embodiment of the present invention is installed between a first member 101 and a second member 102. 2A and 2B show a configuration of the spring 1, in which FIG. 2A is a perspective view and FIG. 2B is a side sectional view of a right side portion of the spring 1. FIG. FIG. 2B shows a state where one spring 1 is installed between the first member 101 and the second member 102. 3A and 3B are side cross-sectional views showing the relationship between the outer diameter and inner diameter of the end portions of the laminated portions 11 and 12 of the spring 1.

  The spring 1 includes, for example, a main body 10 having a hole 10A formed at the center. The main body 10 extends, for example, in a direction intersecting with the direction of the pressing force from the first member 101 and the second member 102, and has a function as a disc spring by inclining as it goes downward. The upper surface and the lower surface of the main body 10 are the formation surfaces of the hole 10A. The hole 10A has, for example, a circular shape.

  A first laminated portion 11 (a laminated portion on the inner circumferential portion side) that protrudes toward the first member 101 is provided on the inner circumferential portion of the main body portion 10. In the first laminated portion 11, as shown in FIG. 3A, the inner diameter s2 of the end on the corner 13 side is set larger than the outer diameter s1 of the end opposite to the corner 13 ( That is, s2> s1). The first laminated portion 11 is, for example, a tapered portion whose cross section is linear and whose diameter increases from the first member 101 toward the main body portion 10.

  A second stacked portion 12 (a stacked portion on the outer peripheral portion side) that protrudes toward the second member 102 is provided on the inner peripheral portion of the main body portion 10. In the second laminated portion 12, the outer diameter t1 of the end portion on the corner portion 14 side is set smaller than the inner diameter t2 of the end portion on the opposite side to the corner portion 14 (that is, t1 <t2). The second laminated portion 12 is, for example, a tapered portion whose cross section is linear and whose diameter increases from the main body portion 10 toward the second member 102.

  Since the 1st lamination | stacking part 11 and the 2nd lamination | stacking part 12 are comprised as mentioned above, the 1st lamination | stacking parts 11 of the spring 1 adjacent to each other can be fitted, and the 2nd lamination | stacking of the spring 1 adjacent to each other is possible. The parts 12 can be fitted to each other.

  A first corner 13 is formed at the boundary between the main body 10 and the first stacked portion 11, and a second corner 14 is formed at the boundary between the main body 10 and the second stacked portion 12. The first corner portion 13 and the second corner portion 14 can be elastically deformed so that their angles (angles α and β in FIG. 4) change according to the pressing force from the first member 101 and the second member 102. is there. The first corner 13 and the second corner 14 can be formed by various methods. The first corner 13 and the second corner 14 can be formed, for example, by bending the boundary between the main body 10 and the first stacked portion 11 and the boundary between the main body 10 and the second stacked portion 12. For example, it can form by welding of the main-body part 10 and the 1st laminated part 11, and welding of the main-body part 10 and the 2nd laminated part 12.

  The functions of the stacked portions 11 and 12 when a load is applied will be described mainly with reference to FIG. FIG. 4 shows an operating state of one spring 1 installed between the first member 101 and the second member 102, and (A) shows before the operation of the spring 1 (dotted line) and at the time of operation (solid line). FIG. 4B is an enlarged cross-sectional view of the first corner portion 13 and the second corner portion 14 when the spring 1 operates.

  As shown by a dotted line in FIG. 2A, a downward load is applied from the first member 101 to the spring 1 disposed between the first member 101 and the second member 102. Then, as shown by the solid line in FIG. 4B, the spring 1 is bent and the first member 101 moves downward. Reference sign d in FIG. 4A indicates the amount of bending of the spring 1. The broken lines in FIG. 4B indicate the shapes of the stacked portions 11 and 12 before deformation.

  The main body portion 10 extends in a direction crossing the direction of the pressing force from the first member 101, and the first laminated portion 11 is directed from the inner peripheral portion of the main body portion 10 toward the first member 101 on the upper side of the spring 1. Protrudes and abuts there. The first corner portion 13 formed at the boundary between the main body portion 10 and the first laminated portion 11 can be elastically deformed according to the pressing force from the first member 101 when a load is applied.

  Specifically, the first corner portion 13 side portion (the portion below the point S1, hereinafter referred to as the lower portion) in the first laminated portion 11 is the first laminated portion and the main body portion 10 having the above positional relationship. Since it is a part formed at the boundary part of the part 11, it can move to the inside (the left side in the figure) of the inner peripheral part of the main body part 10 while changing the angle α when a load is applied (ie, reduced diameter deformation). can do). An intermediate portion (a portion between points S1 and S2, hereinafter referred to as an intermediate portion) in the first stacked portion 11 may move to the outside (right side in the drawing) of the inner peripheral portion of the main body portion 10 when a load is applied. Yes (that is, it can be expanded and deformed). As described above, the lower portion and the intermediate portion of the first stacked portion 11 can be deformed when a load is applied. Therefore, by appropriately setting the length of the first stacked portion 11, the first portion of the first stacked portion 11 can be changed. Deformation of the member 101 side portion (the portion above the point S2, hereinafter referred to as the upper portion) can be prevented.

  On the other hand, on the lower side of the spring 1, the second laminated portion 12 protrudes from the inner peripheral portion of the main body portion 10 toward the second member 102 and is in contact therewith. In this case, in the second corner portion 14 having the same function as the first corner portion 13, the second corner portion 14 side portion (the portion above the point T <b> 1, the portion below the point T <b> 1) in the second laminated portion 12 at the time of elastic deformation due to load application. The upper part) can move to the outside (right side in the figure) of the outer peripheral part of the main body part 10 while changing the angle β when a load is applied (that is, it can be expanded in diameter). An intermediate portion (a portion between points T1 and T2, hereinafter referred to as an intermediate portion) in the second stacked portion 12 can move to the inside (left side in the drawing) of the outer peripheral portion of the main body portion 10 when a load is applied. (In other words, it can be deformed in a reduced diameter). As described above, the upper portion and the intermediate portion of the second stacked portion 12 can be deformed when a load is applied. Therefore, by appropriately setting the length of the second stacked portion 12, the second member of the second stacked portion 12 can be set. Deformation of the 102 side portion (the portion below the point T2, hereinafter referred to as the lower portion) can be prevented.

  As described above, since the spring 1 has the non-deformable portion in the laminated portions 11 and 12, sliding between the spring 1 and the counterpart member can be prevented. As a result, in the load characteristic of the spring 1, the hysteresis which has been a problem with the disc spring does not occur.

(1-2) Operation of Embodiment The operation of the laminated structure of the spring 1 including the laminated portions 11 and 12 as described above will be described mainly with reference to FIGS.

  As shown in FIG. 1, the three springs 1 are stacked between the first member 101 and the second member 102 so that the formation surfaces of the hole portions 10 </ b> A in the main body portion 10 face each other. In this case, the upper end portion of the first laminated portion 11 of the upper spring 1 is in contact with the lower surface of the first member 101. The lower end portion of the second laminated portion 12 of the lower spring 1 is in contact with the upper surface of the second member 102.

  Here, in the first laminated portion 11, as shown in FIG. 3A, the inner diameter s2 of the end portion on the corner portion 13 side is set larger than the outer diameter s1 of the end portion on the opposite side to the corner portion 13. (Ie, s2> s1). In the second laminated portion 12, as shown in FIG. 3B, the outer diameter t1 of the end portion on the corner portion 14 side is set smaller than the inner diameter t2 of the end portion on the opposite side to the corner portion 14 ( That is, t1 <t2).

  Thereby, as shown in FIG. 1, in the lamination with respect to the lower spring 1 of the intermediate spring 1, the inner surface of the second laminated portion 12 of the intermediate spring 1 is placed on the outer surface of the second laminated portion 12 of the lower spring 1. The inner surface of the first stacked portion 11 of the intermediate spring 1 contacts the outer surface of the second stacked portion 12 of the lower spring 1. In this way, the lower spring 1 is fitted to the intermediate spring 1.

  In the lamination of the upper spring 1 with respect to the intermediate spring 1, the inner surface of the second laminated portion 12 of the upper spring 1 abuts on the outer surface of the second laminated portion 12 of the intermediate spring 1, and the first laminated portion of the upper spring 1. 11 is in contact with the outer surface of the second laminated portion 12 of the spring 1 on the intermediate side. In this way, the intermediate spring 1 is fitted to the upper spring 1.

  When a downward load is applied from the first member 101 to the laminated structure of the three springs 1 arranged as described above, the first laminated portion 11 of the upper spring 1 is applied as shown in FIG. In the upper end portion, sliding between the lower surface of the first member 101 can be prevented. In addition, the lower end portion of the second laminated portion 12 of the lower spring 1 can prevent sliding with the upper surface of the first member 102. Thereby, it is possible to prevent the occurrence of hysteresis in the load characteristics.

  Further, since the first laminated portions 11 and the second laminated portions 12 are fitted to each other as described above, occurrence of side slip (displacement in a direction perpendicular to the axial direction) between the springs is prevented. be able to. Thereby, the guide for axial alignment of springs becomes unnecessary.

  In the first stacked portions 11, as shown in FIG. 5, the lower portion of the upper spring 1 is in contact with the upper portion and the intermediate portion of the intermediate spring 1. In this case, when a load is applied, the lower part of the upper spring 1 tends to undergo diameter reduction deformation, and the middle part of the intermediate spring 1 tends to undergo diameter enlargement deformation. Occurs and the abutting portions are fixed. As shown in FIG. 5, the second stacked unit 12 has a function similar to that of the first stacked unit 11, and the contact portion between the second stacked units 12 is also fixed. Such fixing of the contact portion is performed in the same manner also between the first stacked portions 11 and the second stacked portions 12 of the intermediate spring 1 and the lower spring 1.

  Thereby, since the relative displacement of each contact part can be prevented, generation | occurrence | production of abrasion in lamination | stacking parts can be prevented. Thereby, the occurrence of hysteresis in the load characteristics can be further prevented. Further, since the deflection of the spring 1 becomes equal, a generated load corresponding to the number of installed springs can be reliably obtained.

  FIG. 6 is a graph showing a simulation result regarding the laminated structure of three springs according to the present invention and the load characteristics of a single spring. In the springs used in the examples of the present invention, it was confirmed that hysteresis due to friction did not occur in the load characteristics. Also, in the spring laminated structure (the number of springs is 3) according to the present invention, the generated load of the laminated structure is three times the generated load of the spring 1 alone, and the generated load corresponding to the number of installed springs can be reliably obtained. I confirmed that I was able to.

  In particular, by setting the length of the portion where the stacked portions 11 and 12 are in contact with each other to 15% or more of the length of the stacked portions 11 and 12, the effect of the contact force can be reliably obtained.

(2) Second Embodiment In the second embodiment of the present invention, in the stacked structure of the spring 1 shown in FIG. 1, various fixing methods and fixing are performed on the portion where the first stacked portions 11 and the second stacked portions 12 are in contact with each other. The configuration is the same as that of the first embodiment except that it is fixed by means. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and descriptions of components having the same functions as those in the first embodiment are omitted.

  In the second embodiment, welding, adhesion, caulking, or the like can be used as the fixing method. Further, as the fixing means, it is possible to use a concavo-convex portion or the like for fitting the contact portions to each other. In 2nd Embodiment, since the contact part of 1st lamination | stacking parts 11 and 2nd lamination | stacking part 12 is being fixed, the relative displacement of a mutual contact part can be prevented, As a result, 1st The same effect as in the case of fixing by contact force in one embodiment can be obtained.

(3) Modifications As described above, the present invention has been described with reference to the above embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. In the following modification, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the above embodiment, the cross sections of the stacked portions 11 and 12 are linear so as to connect the end portions to each other. However, the present invention is not limited to this, and the outside of the end portions of the stacked portions 11 and 12 is not limited thereto. Various modifications are possible within the range in which the diameter and the inner diameter satisfy the relationship shown in FIGS. 3 (A) and 3 (B). For example, the cross sections of the stacked portions 11 and 12 can have a step 11A as shown in FIG. Moreover, the cross section of the laminated parts 11 and 12 can make a curved shape.

  For example, in the said embodiment, although the main-body part 10 which makes the taper shape which inclines below toward an outer peripheral part from an inner peripheral part was used, it is not limited to this, A main-body part uses various shapes. be able to. For example, in the spring 2 shown in FIG. 8, a main body portion 20 having a step shape from the inner peripheral portion toward the outer peripheral portion is used. The step shape of the main body portion 20 has a plurality of step portions including a vertical direction portion 21 and a horizontal direction portion 22. A corner 23 is formed at the boundary between the vertical direction portion 21 and the horizontal direction portion 22, a corner 24 is formed at the boundary between the step portions, and the corners 23 and 24 are corner portions of the above embodiment. 13 and 14 can be provided. Further, the spring 3 shown in FIG. 9 uses a main body 30 having a substantially S shape.

  Further, the first member 101 and the second member 102 in contact with the first laminated portion 11 and the second laminated portion 12 may be provided with a stopper for fixing the first laminated portion 11 and the second laminated portion 12 there. it can. Furthermore, a slit can be formed in the main body portion and the laminated portion of the spring 1 for weight reduction.

  The laminated structure of the spring of the present invention can be applied to various mechanisms such as a fastening mechanism and various devices such as a vibration isolator. It goes without saying that the various modifications as described above can be appropriately combined.

  1, 2, 3 ... Spring, 10, 20, 30 ... Main body, 10A ... Hole, 11 ... First laminated part (inner peripheral part side laminated part), 11A ... Stepped part, 12 ... Second laminated part (outer periphery) Part side laminated part), 13 ... first corner part (corner part), 14 ... second corner part (corner part), 101 ... first member, 102 ... second member, α 1, β ... angle, s1, t1 ... Outer diameter, s2, t2 ... Inner diameter

Claims (6)

In a laminated structure of a spring in which a plurality of springs each including a main body having a hole are stacked between the first member and the second member so that the formation surfaces of the holes face each other.
The inner body and the outer periphery of the main body are formed on the outer periphery, and includes a laminated portion protruding toward the adjacent spring,
A corner portion is formed at a boundary portion between the main body portion and the front laminated portion, and the corner portion is elastically deformable so that the angle changes according to the pressing force from the first member and the second member,
In the laminated portion on the inner peripheral portion side, the inner diameter of the end portion on the corner portion side is set larger than the outer diameter of the end portion on the opposite side to the corner portion side,
In the laminated portion on the outer peripheral portion side, the outer diameter of the end portion on the corner portion side is set to be smaller than the inner diameter of the end portion on the opposite side to the corner portion.   The laminated structure of the spring according to claim 1, wherein a portion where the laminated portions abut each other is fixed.   3. The spring laminated structure according to claim 1, wherein a cross section of the laminated portion is linear so as to connect the end portions. 4.   The laminated structure of the spring according to claim 1, wherein a cross section of the main body portion is S-shaped or stepped.   The laminated structure of the spring according to claim 3, wherein a length of a portion where the laminated portions abut is 15% or more of the laminated portion.   The laminated structure of the spring according to any one of claims 1 to 5, wherein the deflection of the spring is equal to each other when the first member is displaced relative to the second member.

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